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1、LakeSci.(湖泊科學(xué)),2009,21(1):61.68http://www.jlakes.org.E-mail:jlakes@niglas.a(chǎn)c.ca~2009byJournalofLakeSciences武漢典型湖泊沉積物中重金屬累積特征及其環(huán)境風險唐陣武1,2,程家麗,岳勇2,3,陳玉敏(1:華北電力大學(xué)能源與環(huán)境研究中心,北京102206)(2:水環(huán)境模擬國家重點實驗室,北京師范大學(xué)環(huán)境學(xué)院,j匕京100875)(3:中圍石油集團安全環(huán)保技術(shù)研究院,北京100083)摘要:采集武漢市8
2、個典型湖泊的表層沉積物,分析11種重金屬的含量及其不同形態(tài)組成,研究了,不同湖泊金屬元素的富集與污染程度,探討了沉積物中重金屬的污染來源及其潛在生態(tài)風險.結(jié)果表明,沉積物中重金屬cd累積最嚴重,zn和Hg也發(fā)生明顯累積.龍陽湖污染較重,南太子湖和墨水湖污染中等,其它湖泊污染總體較輕.沉積物性質(zhì)對重金屬累積的影響不顯著.城市I.業(yè)活動強烈影響著重金屬的分布.不同重金屬的形態(tài)分布差異較大,cd生物可利f}】態(tài)含量最高,其次為Mn、Zn、Co、Cu和Pb:而sb和Hg以殘留態(tài)占絕對優(yōu)勢,生態(tài)風險較?。嚓P(guān)
3、分析和主成分分析表明,化石燃料燃燒、金屬冶煉等是武漢市湖泊沉積物中重金屬來源的主要貢獻者,同時巖石風化等地球化學(xué)過程也影響著重金屬的污染.關(guān)鍵詞:湖泊沉積物:重金屬地累積指數(shù);形態(tài);主成分分析;武漢AccumulationsandrisksofheavymetalsinthesedimentsfrOm8typicallakesinWuhanChinaTANGZhenwu一.CHENGJiali。YUEYong·3&CHENYumin(1:Energ3,andEnvironmentalResearch
4、Center,NorthChinaElectricPowerUniversi~,Beij'ing102206,PRChina)(2:StateKe),Laborator)oJWaterEnvironmentSimulation,SchoolofEnvironment,BeringNormalUniversit.y,Bering100875PRina1f3:InstituteofSafeO,andEnvironmentProtectionTechnologyofChinaNationalPetrole
5、umCorporation,Beijing100875,PRChina)Abstra~:Thecontentandspeciesof11heavymetalsinsurfacesedimentsfrom8typicallakeslocatedinWuhan,China,wereinvestigated,andtheaccumulation,contamination,potentialecologicalrisksandpossiblesourcesofmetalswerediscussedinth
6、ispaperAccordingtothemetalgeoaccumulationindexes,theresultsshowedthatthelakesedimentshadheavilypollutedbyCdandex,identlybyZnandHgOnthewhole,heavypollutionsofmetalswereobservedinLakeLongyangandmediumpollutioninLakeNantaiziandLakeMoshui,whereastheslightp
7、ollutioninotherlakes.DistributionofmetalsinsedimentswasobservedtobenotsignificantcorrelationwithphysicOchemicalpropertiesofsediments,whereasdistinctlyinfluencedbyurbanindustries.11metalsdistributeddiferentlyinlakesediments.Thelargestpercentageoftheform
8、ofavailablespeciationwasCdinthelakesediments,withmuchhigherpotentialecologicalhazards,followedbyMn,Zn,Co,CuandPb.Incontrary,As,SbandHgweredominantlyassociatedwiththeresidualfraction,indicatingrareadversebiologicaleffects.Correlationanal